Apparatus for making prepared roofing



Jan. 1,11929. l 1,697,464.

w. 1'. HoFMNN APPARATUS FOR IIAKING- PREPARED yROOFING Filed March 17'. 1922 l Patented Jan. 1, y1929.

UNITEDy STATES PATENT oFF-ICE. I

WILLIAM T. HOFMANN, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, l

TO THE FLINTKOTE COMPANY, F BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

APPARATUS FOR MAKING PREPARED ROOFING.`

Application led March 17, 1922. Serial No. 544,595.

This invention relates to improvements in method of making prepared roofing and apparatus used in connection therewith, and refers more particularly to a method of removing narrow strips of the bituminous coating which is applied to the surface of prepared rooting so that when the sheet is cut into shingle units or strips and laid upon a roof,

Among the objects of the invention are to provide a method of scraping or pushing aside n the asphaltic coating inthe form of a trough as it comes between the rolls from the coating bath, and simultaneously therewithainjecting air to set the edges of the form trough to prevent the coating substance from flowing into the uncoated band and obliterating the design.

Fig. l is a diagrammatic side elevational view of a portion of themachine showing the device for producing the bands on the sheet.

Fig. 2 is a plan view of the apparatus shown in Figl with both rolls removed.

Fig. 3 is an enlarged detail taken along the line 3-3 in Fig. 2 looking in the direction of the arrows.

l Fig. 4 is a sectional view taken along the line 4 4 in Fig. 2 looking in the direction of the arrows.

Referring in detail to the drawings, the

y sheet l to be coated is of felted fibrous material such as is commonly used in the roofing art in the making of prepared roofing shingles, strips or sheeted roll roofing. This material is provided from any convenient source in the usual manner and is run through the saturating or coating bath 2 which consists of a viscous bituminous substance such as asphalt or the like. The sheet after being coated with the bituminous substance, is lpassed over the roll 3 and between the pressure roll 4 andthe bed roll 5 where the coating substance is evenly distributed over the sheet. i

the sheet 'are positioned air tubes 6 which are connected to a [common header 7 which is s11pthe product gives the appearance of shingles.'

At regular intervals across the surface of the sheet as it passes between the rolls. The bands or scrapers have the eect of a sled runner or ski which on passing through the snow leaves a regular uniform track. In a like manner, the Scrapers 9 push aside the asphalt and produce straight, regular tracks or troughs in the coating, .and being set next 00 to the sheet they prevent the coating substance from accumulating on the portions over which they pass, Simultaneously with the forming of these straight tracks or troughs in the coating substance, there is a steady air blast blown down through the separate tubes 6 and through the narrow mouth pieces 6a, which serves to partially cool or set the edges of the troughs or tracks and prevent the viscous bituminous substance from flowing back into the tracks made by the Scrapers after passing between the rolls. Thus there is formed in the coated sheet, a straight, regular banded design which will stand out in bold relief after a surfacing material has been applied,

'due to the fact that the straight banded portions will remain unsurfaced. After passing the rolls 4 and 5 the sheet is surfaced with granular material such as colored slates and other grits a plied thereto by means of a hopper 10. i ubsequent to the application of the surfacing material the sheet is further rolled and cut in any manner desired in the usual manner in the production of roofing strips, shingles or roll roong.

Heretofore it has been common practice either to paint the design upon a roofing sheet, cut away solid portions or tabs from the shingles, strips or sheets to produce a -shingle effect, or remove the surfacing material after its application, to produce the desired design. Such methods are objectionable for various reasons such as expense of manufacture'an'd curling of the shingle portions laid upon a roof where the sheet or strips have been solid, to produce a shingle effect.

The simplicity and economical character of this method of producing prepared roofing is admirably adapted to the production of roll rooting, shingle strips or other types of prepared roofing in which a waterproof coat`- `ing substance is applied to a base material and a shingle design imposed thereon. Inrpla'ce of a straight banded design', by oscillating slowly and simultaneously by mechanical means not shown, themout-h pieces and scrap-` ers, wavy tracks or designs may be imposed upon the sheet simulating a tile roof when laid.

I claim as my invention:

1. In an apparatus for making prepared roofing, the combination with means for coating a sheet with a plastic waterproofing substance, a pair of press rolls between which said coated sheet is passed, and scraping means positioned at the nip of the rolls for forming longitudinal depressions in the plastic coating.

2. In an apparatus for'making prepared rooting, the combination with means for coating a sheet with a plastic waterprooing substance, a pair of press rolls between which said coated sheet is passed, scraping means positioned at the nip of the rolls for torming longitudinal depressions in the plastic coating, and means for delivering a cooling medium to the scraped portions of the sheet.

In an apparatus for making prepared rooting, the combination with means for coating a sheet with a plastic waterproofing.

substance, a pair of press rolls between which said coated sheet 1s passed, scraping means positioned at the nip of the rolls for form; i

ing longitudinal*depressions in the plastic coating, and means located beyond the rolls for distributing crushed mineral on the coated sheet.

4. In an apparatus for making prepared roofing, a combination with means for saturating and coating a sheet with a waterproofing substance, of cylindrical press rolls for distributing the coating substance, non-rotary means positioned at the nip of the rolls tor removing the coating substance from predetermined areas to produce grooves in the otherwise flat coating, and means for applying granular material to the coating.

5. In an apparatus for making prepared rooting, the combination with a means for satin-ating and coating a sheet with a waterproofing substance, of press rolls for distributing the coating substance, means positioned between the rolls for removing the coating substance from predetermined areas to produce a design upon the sheet, and means for applying a granular surface there- WILLIAM T. HOFMANN. 

